Originally posted by FMXhellraiser
They are the same. Ground problem I think. The wires on this truck are screwed, really old and brittle. Some of them are not even soldierd together they are just wrapped together. Could be anything but I am pretty sure it's a ground since the connections are rusted all over the place.

I had the same problem this evening I work the graveyard shift. the ground on my 72 elcomino is the black wire. but the other wires were loose and caused the problem good luck Ed